Semiconductor device and voltage regulator

1. A voltage regulator having:

a voltage regulator circuit contained in a chip size package, said chip size package comprising:

a semiconductor chip having at least a bonding pad;

at least a terminal of said chip size package; and

a reroute trace formed between said bonding pad and said terminal on said chip size package,

wherein said reroute trace is formed to have a desired resistance.

2. The voltage regulator as claimed in claim 1 , wherein:

said chip size package has a plurality of said terminals, each of which is connected to said bonding pad through one of a plurality of said reroute traces, and

said semiconductor chip comprises a voltage regulator circuit, and a load is connected to one terminal connected to one reroute trace having a lowest resistance among said reroute traces, and a phase compensation capacitor is connected to another terminal connected to another reroute trace having a predetermined resistance among said reroute traces.

3. The semiconductor device as claimed in claim 2 , wherein said predetermined resistance is between 10 milli-ohms and 10 ohms.

4. The voltage regulator as claimed in claim 1 , wherein:

said semiconductor chip comprises a voltage regulator circuit, and

a load and a phase compensation capacitor are connected to said terminal of said chip size package connected to said reroute trace having said desired resistance.

5. The voltage regulator as claimed in claim 4 , wherein said desired resistance of said reroute trace is designed by means of lengthening said reroute trace, narrowing said reroute trace or selecting a material of said reroute trace.

6. The voltage regulator as claimed in claim 4 , wherein said desired resistance is between 10 milli-ohms and 200 milli-ohms.